Browsing Articles publicats (Matemàtica) by Title
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Decompositions of a rectangle into noncongruent rectangles of equal area
(Elsevier, 202106)In this paper, we deal with a simple geometric problem: Is it possible to partition a rectangle into k noncongruent rectangles of equal area? This problem is motivated by the socalled 'Mondrian art problem' that asks a ... 
Degree diameter problem on honeycomb networks
(Elsevier, 20140823)The degree diameter problem involves finding the largest graph (in terms of the number of vertices) subject to constraints on the degree and the diameter of the graph. Beyond the degree constraint there is no restriction ... 
Degree/diameter problem for mixed graphs
(Elsevier, 2015)The Degree/diameter problem asks for the largest graphs given diameter and maximum degree. This problem has been extensively studied both for directed and undirected graphs, ando also for special classes of graphs. In this ... 
Deriving quantised inertia using horizonwidths in the uncertainty principle
(Hikari Ltd., 2020)In this paper we show that a model for inertial mass (quantised inertia) can be derived exactly and simply by assuming that the property of inertia is caused by gradients in the energy in the Unruh radiation field seen ... 
Designing ecommerce supply chains: a stochastic facility–location approach
(Wiley, 201707)eCommerce activity has been increasing during recent years, and this trend is expected to continue in thenear future. eCommerce practices are subject to uncertainty conditions and high variability in customers’demands. ... 
Determination of Zn2+ concentration with AGNES using different strategies to reduce the deposition time
(Elsevier, 2005)Absence of gradient and Nernstian equilibrium stripping (AGNES) senses the free ion concentration of Zn(II) in solutions containing different ligands, being unaffected by the lack of reversibility of the Zn2+/Zn0 couple ... 
Deterministic hierarchical networks
(IOP Publishing, 201605)It has been shown that many networks associated with complex systems are smallworld (they have both a large local clustering coefficient and a small diameter) and they are also scalefree (the degrees are distributed ... 
(Di)graph decompositions and magic type labelings: a dual relation
(Springer, 202010)A graph G is called edgemagic if there is a bijective function f from the set of vertices and edges to the set {1, 2, . . . , V (G) + E(G)} such that the sum f(x) + f(xy) + f(y) for any xy in E(G) is constant. Such ... 
(Di)graph products, labelings and related results
(Elsevier, 2017)Gallian's survey shows that there is a big variety of labelings of graphs. By means of (di)graphs products we can establish strong relations among some of them. Moreover, due to the freedom of one of the factors, we can ... 
Directional analysis for point patterns on linear networks
(Wiley, 2020)Statistical analysis of point processes often assumes that the underlying process is isotropic in the sense that its distribution is invariant under rotation. For point processes on ℝ2, some tests based on the K‐ and nearest ... 
Distance labelings: a generalization of Langford sequences
(University of Primorska, 2017)A Langford sequence of order m and defect d can be identified with a labeling of the vertices of a path of order 2m in which each label from d up to d + m − 1 appears twice and in which the vertices that have been labeled ... 
Distancebased topological polynomials associated with zerodivisor graphs
(Hindawi, 202105)Let R be a commutative ring with nonzero identity and let Z(R) be its set of zero divisors. The zerodivisor graph of R is the graph T(R) with vertex set V(T(R))=Z(R)*, where Z(R)*=Z(R)\{0} , and edge set E(T(R))={{x,y}:x·y=0} ... 
Distorting the volcano
(Elsevier, 2018)Volcanoes of ℓ–isogenies of elliptic curves are a special case of graphs with a cycle called crater. In this paper, given an elliptic curve E of a volcano of ℓ–isogenies, we present a condition over an endomorphism ϕ ... 
Divergence and PoincareLiapunov constants for analytic differential systems
(Elsevier, 2015)We consider a planar autonomous real analytic differential system with a monodromic singular point p. We deal with the center problem for the singular point p. Our aim is to highlight some relations between the divergence ... 
Do you need to see it to believe it? Let's see statistics and geometry dynamically together!
(Eastern Mediterranean University, 2014)Statistical graphs, measures of central tendency and measures of spread are key concepts in the statistics curriculum, so we present here a dynamic method (software) that may be used in the classroom. In this work we begin ... 
Dynamics of competition over water in a mixed oakpine Mediterranean forest: spatiotemporal and physiological components
(Elsevier, 20161215)Understanding inter and intraspecific plant interactions and competition over water is challenging because of the lack of effective approaches for accessing and monitoring root distribution and activity. In this context, ... 
Economic assessment of pig meat processing and cutting production by simulation
(Walter de Gruyter, 201904)This paper presents the development and adoption of a discrete event simulation model of a pig meatpacking plant located in Navarre (Spain). The simulation model was developed to represent all the tasks and pig meat cuts ... 
Edge distanceregular graphs
(Elsevier, 201112)Edgedistanceregularity is a concept recently introduced by the authors which is similar to that of distanceregularity, but now the graph is seen from each of its edges instead of from its vertices. More precisely, a ... 
Effect of cattle on Salmonella carriage, diversity and antimicrobial resistance in freeranging wild boar (Sus scrofa) in northeastern Spain
(Public Library of Science, 2012)Salmonella is distributed worldwide and is a pathogen of economic and public health importance. As a multihost pathogen with a long environmental persistence, it is a suitable model for the study of wildlifelivestock ... 
Effective construction of PoincaréBendixson regions
(Shanghai Normal University & Wilmington Scientific Publisher, 2017)This paper deals with the problem of location and existence of limit cycles for real planar polynomial differential systems. We provide a method to construct PoincaréBendixson regions by using transversal curves, that ...